{"title":"Nosé-Hoover Integrators at-a-Glance: Barostat Integration Has a Demonstrable Effect on Uniaxial Tension Results of Solid Materials.","authors":"Thomas J Barrett, Marilyn L Minus","doi":"10.1021/acs.jctc.4c01190","DOIUrl":null,"url":null,"abstract":"<p><p>Molecular dynamics is a popular method for evaluating the tensile stress behaviors of many nanomaterials; however, few manuscripts include their thermostat and barostat damping parameters along with their methods. Here, we illustrate the demonstrable effect that barostat integration has on system dynamics during uniaxial testing under a Nosé-Hoover scheme. Three systems are tested: a 2D graphene sheet, a 3D continuous aluminum volume, and a 3D discontinuous polyvinyl alcohol volume. Isobaric-isothermal (NPT) and isochoric-isothermal (NVT) integration methods are intrinsically related, with high NPT barostat damping parameters converging on the NVT system. As a result, slight variations in barostat damping parameters may elicit different stress responses with higher damping parameters directly linked to increased levels of triaxial strain.</p>","PeriodicalId":45,"journal":{"name":"Journal of Chemical Theory and Computation","volume":" ","pages":""},"PeriodicalIF":5.7000,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Chemical Theory and Computation","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acs.jctc.4c01190","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Molecular dynamics is a popular method for evaluating the tensile stress behaviors of many nanomaterials; however, few manuscripts include their thermostat and barostat damping parameters along with their methods. Here, we illustrate the demonstrable effect that barostat integration has on system dynamics during uniaxial testing under a Nosé-Hoover scheme. Three systems are tested: a 2D graphene sheet, a 3D continuous aluminum volume, and a 3D discontinuous polyvinyl alcohol volume. Isobaric-isothermal (NPT) and isochoric-isothermal (NVT) integration methods are intrinsically related, with high NPT barostat damping parameters converging on the NVT system. As a result, slight variations in barostat damping parameters may elicit different stress responses with higher damping parameters directly linked to increased levels of triaxial strain.
期刊介绍：
The Journal of Chemical Theory and Computation invites new and original contributions with the understanding that, if accepted, they will not be published elsewhere. Papers reporting new theories, methodology, and/or important applications in quantum electronic structure, molecular dynamics, and statistical mechanics are appropriate for submission to this Journal. Specific topics include advances in or applications of ab initio quantum mechanics, density functional theory, design and properties of new materials, surface science, Monte Carlo simulations, solvation models, QM/MM calculations, biomolecular structure prediction, and molecular dynamics in the broadest sense including gas-phase dynamics, ab initio dynamics, biomolecular dynamics, and protein folding. The Journal does not consider papers that are straightforward applications of known methods including DFT and molecular dynamics. The Journal favors submissions that include advances in theory or methodology with applications to compelling problems.
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